t)r. Withering’s Account of fome 
Part of the ele&ric matter pafl'ed down a walking flick, 
which the man held in his hand, (loping from him; and 
where the flick refted on the ground, it made a perforation 
about 2 \ inches m diameter, and ^ inches deep, -Tins no,^ f 
examined foon afterwards, and found nothing in it but the 
burnt roots of the grafs. All obfervation would probably have 
ended here, had not Lord Aylesford determined to ereft a mo- 
nument upon the fpot, not merely to commemorate the event, 
but with an infcription, to caution the unwary againft the danger 
of fheltering under a tree during a thunder ftorm. In digging 
the foundation for this monument, the earth was difturbed at 
the perforation before mentioned, and the foil appeared to be 
blackened to the depth of about ten inches. At this depth, a 
root of the tree prefented itfelf, which was quite black ; but 
this blacknefs was only fuperficial, and did not extend far 
along it. About two inches deeper, the melted quartzofe mat- 
ter began to appear, and continued in a hoping direction to 
the depth of 18 inches. 
The fpecimens which accompany this Paper, and for which 
1 am indebted to the attention of Lord Aylesford, will de- 
monftrate the intenfe heat which mud have exifted to bring 
fuch materials into fufion. 
N° i. A quartz pebble, one corner of which has been com- 
pletely fufed. 
2. Sand, unmixed with calcareous matter, agglutinated 
by the heat. Within the hollow part of this mafs, the fuliou 
has been fo perfect, that the melted quartzofe matter has run 
down the hollow, and afiumed nearly a globular figure. 
N° 3. Smaller hollow pieces, and one nearly flat, but all 
the flat ones have fome hollow part *. 
* Thefe fpecimens were laid before the Society when the Paper was read. C. B, 
' Mr. 
